Rarity the Jewel Thief

The most obvious thing in this picture is the jewels on her chest, her body is at a 3/4th view, but the jewels themselves are in front view. This makes the picture look very strange because it's not all in the same perspective. It's a fairly easy fix though. Her tail also seems to be too high on her back, looking at official artwork from the show it should be further down, closer to her butt. Rogue also has heels, and that looks like what you were going for, but her feet seem to be level rather than her heels being higher than her toes. So instead her shoes look like regular shoes with a cut in them.